Noun
lekku
plural of lek
lekku (plural lekkus)
Either of the two appendages that protrude from the head of a Twi'lek (a race of creatures in Star Wars)
Apparently, she'll be seen wearing a hood when we first meet her, but Tano's Togruta Lekku (head tails) will be on full display at some point, and the plan is for her to make "more than a brief cameo." Source: Internet